51030901 has 2 divisors, whose sum is σ = 51030902. Its totient is φ = 51030900.

The previous prime is 51030893. The next prime is 51030949. The reversal of 51030901 is 10903015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48986001 + 2044900 = 6999^2 + 1430^2 .

It is a cyclic number.

It is not a de Polignac number, because 51030901 - 2³ = 51030893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51030971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25515450 + 25515451.

It is an arithmetic number, because the mean of its divisors is an integer number (25515451).

Almost surely, 2^51030901 is an apocalyptic number.

It is an amenable number.

51030901 is a deficient number, since it is larger than the sum of its proper divisors (1).

51030901 is an equidigital number, since it uses as much as digits as its factorization.

51030901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 135, while the sum is 19.

The square root of 51030901 is about 7143.5916036683. The cubic root of 51030901 is about 370.9178599670.

Adding to 51030901 its reverse (10903015), we get a palindrome (61933916).

The spelling of 51030901 in words is "fifty-one million, thirty thousand, nine hundred one".